5 Machines That Liberated Women

4. Refrigerator

Until the invention of the refrigerator, women utilized salts, packing techniques, and cellars to keep some food and meats cold through seasons, which required a significant amount of manpower to create and maintain.

The first practical refrigerating machine was built by Jacob Perkins in 1834; it used ether in a vapor compression cycle.

Then in 1928, Thomas Midgley, Jr. aided by Charles Franklin Kettering invented a “miracle compound” called Freon- an inflammable gas that undergoes an evaporation process again and again that maintain a low temperature. Allowing women a safe, convenient place to keep food at a constant low temperature with as little labor as possible.